package sy4_2;

public class Keybord implements USB {

    @Override
    public void open() {
        System.out.println("Keybord start work");
    }

    @Override
    public void close() {
        System.out.println("Keybord stop work");
    }
    public void beat(){
        System.out.println("beat Keybord");
    }
}
